COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Small quantities of air at low pressures

Large quantities of air at high pressures

Small quantities of air at high pressures

Large quantities of air at low pressures

None of these

Surrounding air

Its own oxygen

Compressed atmospheric air

Relief valve

Start-stop motor

Constant speed unloader

Variable speed

Impeller outlet radius

Diffuser outlet radius

Diffuser inlet radius

Impeller inlet radius

Decreases

Increases

Remain unaffected

May increase or decrease depending on compressor capacity

Lower

Higher

Same

None of these

Jet velocity

Half the jet velocity

Average of the jet velocity

Twice the jet velocity

Compressor work and turbine work

Actual compressor work and theoretical compressor work

Output and input

Actual total head temperature drop to the isentropic total head drop from total head inlet to static head outlet

60 to 70%

40 to 60%

10 to 40%

70 to 90%

Swept volume

Compressor capacity

None of the listed here

Free air delivery